Biology

The answer is “Decomposition of organic compounds.”

Decomposition of organic compounds is the process carried out by decomposers such as certain bacteria and fungi. These organisms break down complex organic matter into simpler substances, recycling nutrients back into the ecosystem. Cyanobacteria, on the other hand, are primary producers that synthesize organic compounds through photosynthesis rather than decomposing them.

The other options are correct:

Option A: Cyanobacteria convert solar energy into c...